Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display device, comprising: a plurality of pixels, a plurality of first scan lines, and a plurality of data lines, wherein the plurality of pixels are connected with the plurality of first scan lines and the plurality of data lines and each of the plurality of pixels comprises one or more polysilicon transistors and one or more oxide semiconductor transistors; a plurality of second scan lines connected with the plurality of pixels; a scan driver, wherein the scan driver comprises a plurality of stage circuits to supply a plurality of scan signals to the plurality of first scan lines and to supply a plurality of output signals to the plurality of second scan lines; and a data driver configured to supply a plurality of data signals to the plurality of data lines, wherein at least some of the plurality of stage circuits comprise: a driving circuit unit configured to provide one of the plurality of output signals; and an inverter configured to invert the output signal of the driving circuit unit and generate one of the plurality of scan signals, and wherein: the inverter comprises a first transistor and a second transistor, the first transistor and the second transistor are configured for complementary operation, the first transistor is a P-type polysilicon transistor, the second transistor is an N-type oxide semiconductor transistor, at least some of the one or more polysilicon transistors receives the output signal of the driving circuit unit through one of the plurality of second scan lines, and at least some of the one or more oxide semiconductor transistors receives one of the plurality of scan signals through one of the plurality of first scan lines.
A display device includes an array of pixels, each connected to first scan lines and data lines, with each pixel containing both polysilicon transistors and oxide semiconductor transistors. The device also features second scan lines connected to the pixels, a scan driver, and a data driver. The scan driver includes multiple stage circuits that supply scan signals to the first scan lines and output signals to the second scan lines. The data driver provides data signals to the data lines. In some stage circuits, a driving circuit unit generates an output signal, which is then inverted by an inverter to produce a scan signal. The inverter consists of a P-type polysilicon transistor and an N-type oxide semiconductor transistor operating in a complementary manner. The output signal from the driving circuit unit is transmitted to polysilicon transistors in the pixels via the second scan lines, while the scan signal is delivered to oxide semiconductor transistors in the pixels through the first scan lines. This configuration leverages the complementary characteristics of polysilicon and oxide semiconductor transistors to enhance display performance and efficiency.
2. The display device of claim 1 , further comprising a common node, a first driving power source, and a second driving power source, wherein for each stage circuit: the first transistor is connected between the common node and the first driving power source, the second transistor is connected between the common node and the second driving power source, and the common node is electrically connected with one of the plurality of first scan lines to output one of the plurality of scan signals.
This invention relates to display devices, specifically addressing the need for efficient and reliable scan signal generation in display panels. The device includes a plurality of stage circuits, each configured to generate a scan signal for driving a display. Each stage circuit comprises a first transistor and a second transistor, along with a common node, a first driving power source, and a second driving power source. The first transistor is connected between the common node and the first driving power source, while the second transistor is connected between the common node and the second driving power source. The common node is electrically connected to one of the scan lines to output the generated scan signal. This configuration allows for controlled switching between the driving power sources, enabling stable and precise scan signal output. The stage circuits are designed to operate in sequence, ensuring proper timing and synchronization of the scan signals across the display panel. The use of multiple transistors and power sources enhances the reliability and efficiency of the scan signal generation process, addressing issues such as signal distortion and power consumption in display devices.
3. The display device of claim 1 , wherein a channel width of the second transistor is larger than a channel width of the first transistor.
This invention relates to a display device incorporating thin-film transistors (TFTs) with improved performance. The device addresses the challenge of achieving uniform and stable display quality by optimizing the transistor design within the pixel circuitry. The display device includes a first transistor and a second transistor, where the second transistor has a larger channel width than the first transistor. This design ensures that the second transistor can handle higher current loads or provide enhanced switching capabilities compared to the first transistor. The first transistor may function as a switching element, controlling the flow of data signals to the pixel, while the second transistor may act as a driving element, supplying current to the pixel's light-emitting component, such as an OLED. By increasing the channel width of the second transistor, the device improves current-driving efficiency, reduces power consumption, and enhances the overall brightness and uniformity of the display. The invention is particularly useful in high-resolution and large-area displays where precise control of pixel brightness is critical. The larger channel width of the second transistor compensates for variations in transistor characteristics, ensuring consistent performance across the display panel. This design also helps mitigate degradation over time, extending the lifespan of the display device.
4. The display device of claim 1 , wherein a channel length of the second transistor is smaller than a channel length of the first transistor.
A display device includes a first transistor and a second transistor, where the second transistor has a shorter channel length than the first transistor. The transistors are part of a pixel circuit that drives a light-emitting element, such as an organic light-emitting diode (OLED). The first transistor operates as a driving transistor, controlling current flow to the light-emitting element based on a data signal. The second transistor, with its shorter channel length, functions as a switching transistor, rapidly turning on and off to transmit the data signal to the driving transistor. The shorter channel length in the second transistor reduces its resistance, improving switching speed and efficiency. The pixel circuit may also include a storage capacitor to maintain the data signal voltage during the display frame. The display device is designed to enhance performance by optimizing transistor dimensions for their respective roles, ensuring faster response times and lower power consumption. This configuration is particularly useful in high-resolution or high-refresh-rate displays where precise and rapid control of pixel brightness is required.
5. The display device of claim 1 , wherein the second transistor is a double gate transistor comprising two gate electrodes.
A display device includes a pixel circuit with a first transistor and a second transistor. The second transistor is a double-gate transistor with two gate electrodes, allowing for improved control over current flow. The pixel circuit is configured to drive a light-emitting element, such as an organic light-emitting diode (OLED), to emit light based on a data signal. The double-gate structure of the second transistor enhances stability and reduces leakage current, improving the display's performance and efficiency. The first transistor may function as a switching transistor to control the flow of the data signal, while the second transistor operates as a driving transistor to supply current to the light-emitting element. The use of a double-gate transistor in the pixel circuit helps mitigate threshold voltage variations and ensures consistent brightness across the display. This design is particularly useful in high-resolution and large-area displays where uniformity and reliability are critical. The double-gate transistor can be fabricated using standard semiconductor processes, making it compatible with existing display manufacturing techniques. The overall structure improves the display's lifetime and reduces power consumption by minimizing unwanted current leakage.
6. The display device of claim 1 , wherein: the driving circuit unit comprises a plurality of transistors, and the plurality of transistors have the same conductive type.
A display device includes a driving circuit unit with multiple transistors of the same conductive type, such as all N-type or all P-type transistors. This design simplifies manufacturing by reducing the need for different transistor types, lowering production complexity and cost. The transistors are used to control pixel elements, ensuring uniform electrical characteristics and consistent performance across the display. By using identical conductive types, the circuit avoids mismatches in threshold voltages or drive capabilities, improving reliability and image quality. The driving circuit unit may also include additional components like capacitors or resistors to stabilize voltage levels and enhance signal integrity. The display device may be an organic light-emitting diode (OLED) or liquid crystal display (LCD), where precise current or voltage control is critical for accurate pixel illumination. The uniform transistor type reduces variability in pixel brightness and response times, leading to a more uniform display output. This approach is particularly useful in high-resolution displays where consistency across millions of pixels is essential. The invention addresses challenges in transistor integration, such as process compatibility and yield, by standardizing the conductive type, making it easier to scale production.
7. The display device of claim 1 , wherein: the output signal of the driving circuit unit comprises a low level pulse, and each of the plurality of scan signals comprises a high level pulse.
A display device includes a driving circuit unit that generates an output signal containing a low-level pulse, and a scan driver that produces multiple scan signals, each containing a high-level pulse. The driving circuit unit controls the timing and characteristics of the output signal, which is used to drive display elements such as pixels or subpixels. The scan driver generates scan signals to sequentially activate rows or columns of display elements, ensuring proper synchronization with the output signal. The low-level pulse in the output signal may be used to reset or initialize display elements, while the high-level pulses in the scan signals enable the selection of specific rows or columns for data writing. This configuration ensures efficient control of the display panel, improving display performance and reducing power consumption. The interaction between the driving circuit unit and the scan driver allows for precise timing and synchronization, enhancing the overall functionality of the display device. The invention addresses challenges in display driving, such as signal integrity, power efficiency, and synchronization, by optimizing the waveform characteristics of the output and scan signals.
8. The display device of claim 1 , wherein: the one or more polysilicon transistors are P-type transistors, and the one or more oxide semiconductor transistors are N-type transistors.
This invention relates to a display device incorporating a hybrid transistor architecture to improve performance and efficiency. The device combines polysilicon transistors and oxide semiconductor transistors in a complementary configuration to address limitations in conventional display backplane designs. Polysilicon transistors, typically used for their high mobility and stability, are configured as P-type transistors, while oxide semiconductor transistors, known for their low off-state current and high on/off ratio, are configured as N-type transistors. This complementary arrangement leverages the strengths of both transistor types to enhance display performance, reduce power consumption, and improve reliability. The hybrid structure allows for efficient switching and stable operation, making it suitable for high-resolution and flexible display applications. The invention addresses challenges such as leakage current, switching speed, and long-term stability in display backplanes, providing a balanced solution that combines the advantages of both transistor technologies.
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September 22, 2020
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